Fix negative ints

torrent-tiny

@@ -57,7 +57,7 @@ def read_int(fp, c = b'', end = b'e'):
 		c = fp.read(1)
 		if c == end:
 			break
-		elif c in b'0123456789':
+		elif c in b'-0123456789':
 			i += c
 		else:
 			raise ValueError